What, are new people not entitled to an opinion? Do they need to seek your approval before posting?
If one wishes to criticize a forum one just joined, it’s sort of unusual to criticize aspects of that forum of longstanding as if those aspects are recent. They’re not. It might also come across as also rather presumptuous to do so.
The ones who do not like having their hatred and prejudices pointed out will squawk the loudest about open debate. Which really means they have no interest in discussing things rationally and truthfully.